Lock lid for box compartments



Jan. 18, 1949. D. c. THOMPSON LOCK LID FOR BOX COMPARTMENTS Filed Nov.12, 1946 INVENTOR. DONALD c. THOMPSON Patented Jan. 18, 1949 LOCK LIDFOR BOX COMPARTMENTS Donald C. Thompson, Roanoke, Va., assignor toAmerican Viscose Corporation, Wilmington, Del., a corporation ofDelaware Application November 12, 1946, Serial No. 709,389

9 Claims. 1

This invention relates to an improved method of application of a locklid to spinning box com-- partments, such as may be used in collectingartificial filamentary material produced in accordance with the viscoseprocess on spinning machines.

Heretofore many lock lids that have been employed have proven to beunsatisfactory, since they have the peculiarity of blowing frequently.This so-called blowing is caused by the high speed of rotation of thespinning pots inside of this box compartment. The spinning pots set upair currents, thrown outwardly due to centrifugal force, and if thereare not adequate means for breaking them up or freeing them from the boxcompartment, the lid on the box compartment will lift and allow theblowing-out and release of the air and gases in the box compartment intothe spinning room. It is imperative that these gases are held to aminimum in the atmosphere of the spinning room, since they containnoxious and corrosive ingredients, viz., hydrogen sulfide and finelyatomized sulfuric acid. Thus, in order to keep the eflioiency of theoperations at their maximum, it is expeditious to employ some de vice toprevent the blowing of lids from box compartments.

The main object of this invention is to provide an improved lid for boXcompartments to substantially entirely prevent the blow-out of gasestherefrom into the atmosphere surrounding the machine.

Ancillary objects and advantages will become more apparent by a study ofthe following description and by reference to the accompanying drawings,in which- Figure 1 is a partial elevation in section of a preferredembodiment of the invention,

Figure 2 is a top view of the lock lid employed in this invention,

Figure 3 is an enlarged view of section 33 of Figure 2,

Figure 4 is a modification of Figure 3, and

Figure 5 is a view of the locking lug and clamp in detail.

As shown in Figures 1 to 3, the spinning pot I into which a funnel 2 isvertically reciprocated is provided with a protective member 4 whichsurrounds the spinning pot I. This complete assembly is mounted in thehousing 3 of the spinning machine. The protective member 4 is providedwith a cover 5 which has a central aperture 5 through which the funnel 2has access to vertically reciprocate. Cover 5 rests in place on member 4in a grooved seat I. firmly in place on member 4 by exerting a slightpressure to finger grip 8, which is mounted to cover 5 so that it slipslug I4 completely under clamps II which are mounted on housing 3.

Cover 5 has a keyhole slot 6 to facilitate the Cover 5 is locked removalof the funnel from the spinning pot I. However, this opening may becircular, oblong, or any other shape, depending on the lifting mechanismof the funnel bracket.

Cover 5 has attached integrally on its underside a beveled baffle I2which is adjacent to, but spaced inwardly from the upper rim of theprotective member 4. The bafile I2 may be annular, oval or square,depending on the design of the upper edge of protective member 4.

Due to the rotation of the spinning pot I the centrifugal force set upcauses air to be drawn in through aperture 5 from which place it goesalong the under side of the top of cover 5, passes under the beveledbafile I2 and downthe inside of protective member 4. evacuated throughduct I0 by a pump (not shown). Impurities in the form of liquids aredirected toward duct III by the inclined floor IT on housing 3, directlyunderneath and between the spinning pot and the driving mechanism I6.Liquids are prevented from getting into the driving mechanism by asleeve I8 or the like, which protrudes slightly above and below theinclined floor I'I. member I8. The wall of the protective member may beprojected to the inclined floor II. If this is done, an aperture must beprovided so that the duct III will be able to evacuate the noxious gasesand liquids.

Cover 5 has attached integrally on its under The air and gases are sidea flange I5 near or at its outer circumference which extendsperpendicularly downward and rests upon seat I. This flange may becircular, oval, square or any other shape so as to conform to thedesignof the grooved seat I. The flange I5 and beveled baiile I2 areboth dependcut on the design of the upper rim of protective member 4,and are each substantially the same shape as the other. Further, it ispreferable that the protective member be concentric to the spinning pot.

As shown in Figure 4, the upper rim of protective member 4 may bedesigned in such a way as to have a lead bead burned to the outsidethereof, so that the inside wall of the member will be in the same planefrom the bottom tothe upper edge of the member. However, this is not asgood a principle as is illustrated in Figure 3. The air would cause asuction at I3 in Figure 3 Whereas it probably would not be as effectivein I doing this with the construction shown in Figure 4.

As shown in Figure 5, the under side of clamp I I is arcuate in such away as to lock lug I 4 firmly in place no matter which directionpressure is applied on finger grip 8. In this way a tighter fit isinsured between the cover 5 and protective member 4.

From the disclosure it is readily apparent that In this way, the flow isdeflected around I 3 there are three factors all acting in conjunctionwith one another to prevent the blow-off of noxious vapors and air intothe spinning room. Clamp H holds lug I6, attached to the cover, inplace, which, in turn, seats flange IS in its grooved seat 1 around theupper rim of protective member 4. High pressures under the cover 5 areminimized by virtue of the beveled baifle l2, which reduces the pressurein the space between the beveled baflle l2 and the upper rim ofprotective member 4.

Although this invention has been described with reference to theimprovements shown, it

will readily be appreciated that numerous changes in the details of theconstruction may be made without departing from the spirit and scope ofthe invention as described in the appended claims.

I claim:

1. In combination, a centrifugal spinning pot, means for guidingfilainentarymaterial into the pot, a protective member surrounding thepot. a cover for the protective member, a recess around the upper rim ofthe protective member, a flange extending downwardly from said coverseating in said recess, and means for clamping said flange against itsseat in said recess.

2. In combination, a centrifugal spinning pot, means for guidingfilamentary material into the pot, a protective member surrounding thepot, a cover for the protective member, a recess around the upper rim ofthe protective member, a flange extending downwardly fromsaid coverseating in said recess, a beveled baffle extending from said coveradjacent to the inside periphery of the protective member to minimizepressure at the junction of the flange and its seat in the recess, and

means for clamping said flange against its seat a cover for theprotective member, a recess surrounding the protective member, a flangeextending downwardly from said cover seating in said recess, means forclamping said flange against its seat in said recess, and a beveledbaflie extending from said cover adjacent to the inside periphery of theprotective member to minimize pressure at the junction of the flange andits seat in the recess.

4. In combination, a centrifugal spinning pot, means for guidingfilamentary material into the pot, a protective member surrounding thepot, a cover for the protective member, a recess surrounding the upperedgeof the protective member, a flange extending downwardly from saidcover seating in said recess, a beveled bafiie extending from said coveradjacent to the inside periphery of the protective member to minimizepressure at the junction of the flange and its seat in the recess, andmeans for clamping said flange against its seat in said recess.

5. In combination, a centrifugal spinning pot, means for guidingfilamentary material into the pot, a protective member surrounding thepot, a cover for the protective member, a recess surrounding the upperedge of the protective member, a flange extending downwardly from saidcover seating in said recess, a beveled bafile extending from said coveradjacent to the inside periphery of the protective member to minimizepressure at the junction of the flange and its seat in the recess, andmeans for clamping said flange against its seat in said recess.

6. In combination, a centrifugal spinning pot, means for guidingfilamentary material into the pot, a protective member surrounding thepot, a cover for the protective'member, a recess surrounding the upperedge of the protective member, a flange extending perpendicularlydownward from said cover seating in said recess, a beveled bafileextending from said cover adjacent to the inside periphery of theprotective member to minimize pressure at the junction of the flange andits seat in the recess, and means for clamping said flange against itsseat in said recess.

7. In combination, a centrifugal spinning pot, means for guidingfilamentaryv material into the pot, a protective member surrounding thepot, a cover for the protective member, an annular recess surroundingthe upper edge of the protective member, a flange extendingperpendicularly downward from the underside of said'cover seating insaid annular recess, a beveled baffle extending from said cover adjacentto the inside periphery of the protective member to minimize pres-- sureat the junction of theflange and its seat in the annular recess, andmeans for clamping said flange against its seat in said annular recess.

8. In combination, a centrifugal spinning pot, means for guidingthe'filarnentary material into the pot, a protective member surroundingthe pot, a cover for the protective member, an annular recesssurrounding the upper edge of the prctective member, a flange extendingperpendicularly downward from the outer circumference under side thecover and seating in said annular recess,

a beveled baflie extending from said cover ad-.

jacent to the inside periphery of the protective member to minimizepresure at the junction of the flange and its seat in the annularrecess, means comprising a plurality of diametrically opposed lugs andclamps, the lugs secured under the clamps for clamping said flangeagainst its seat in said annular recess.

9. In combination, a centrifugal spinning pot. means for guiding thefilamentary material into the pot, a protective member surrounding thepot and having an inwardly projecting shoulder around the upper rim ofthe member, said shoulder being beveled downwardly and outwardly to theinside wall of the protective member, a cover for the protective member,an annular groove surrounding the upper edge of the -'pro tectivemember, a flange extending perpendicularly downward from the outercircumference underside the cover and seating in said annular groove, abeveled baffle extending from said cover adjacent to the insideperiphery'of the protec-' .tive member with its bevel in approximatealignment with the bevel of the shoulder to minimize pressure at thejunction of the flange and its seat in'the annular groove, and means forclamping the cover with said flange against its'seatin said annulargroove.

DONALD C. THOMPSON.

REFERENCES CITED The following references are of record inthe file ofthis patent:

UNITED STATES PATENTS

